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Hi Reven
I expect someone who really knows what they are talking about will respond, but, this is what I think.
Are you able to tell if there is something on the surface? If so, it might clean off.
If it looks like the coating is failing at those spots, I suspect it is a matter of just leaving it.
Either way, for visual use, I think it won't be noticeable and for photography I suspect the flats will deal them for you.
Philip
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